UPDATE: Hugo Weaving on a Transformers 2 Return

“I’ve already done it,” Weaving says, adding Bay had told him to keep the news hush-hush. “He’s over in LA and we were working on the video split sort of thing and I had this strange conversation where he seemed to imply it was all a big secret. So there you go, I’ve given you the secret scoop.”

So how is Megatron resurrected?

Weaving is coy about revealing too much, but does give a tiny hint.

“I think in the last one, doesn’t Optimus Prime pick up a little bit of, a little shard of the cube, or the thing that’s left, and he takes it with him. Maybe there’s something there… but I don’t know,” he laughs.

The sequel hits conventional and IMAX theaters on June 24.

UPDATE: Director Michael Bay has posted the following on his official site:

Okay cat is out of the bag. Megatron is back —- but you will only get to see him from the long lost past. We go way back in time as this movie explains the mythology of the Primes. He is not a tank like everyone suggests, but an alien vehicle. But sadly he does not has much screen time.